Wisła Kraków, a storied Polish club rebuilding after relegation, depended on attendance from fans who cherished a deep superstition: that their own presence, good or bad, changed the team's result. The conventional playbook for filling a stand — discounts for loyal season-ticket holders, rewards for the biggest spenders — only ever prizes the top of the loyalty curve. A fan who believed he brought the team ill luck had both a real reason to stay away and, under any standard reward scheme, nothing clawing him back: he was exactly the segment no loyalty programme targets.

VML Poland saw the superstition itself as the asset. It built 'Lucky Fan Index', an AI platform that cross-referenced each fan's match attendance against more than 200 on-pitch metrics (score, xG, control, decisive moments) to compute a personal 0–100 'luck index' — a quantified statement of how Wisła performed with each supporter in the stand.

Published each fan's luck index and paid the 'cursed' end: a discount framed as a chance to improve fortune, turning superstition into a reason to buy.

The luck index made each fan's superstition visible and personal.

Rewarding the 'cursed' fans removed the shame of staying away.

The discount framed as luck-improvement justified attendance within the belief.

No fan segment was left with a reason to stay home, boosting attendance.

When an irrational belief suppresses participation, quantify it and reward the negatively framed segment, turning the belief into a reason to engage.

Six Lions incl. a Creative-Commerce Grand Prix — the first for a Polish club — plus a white-label offer; it claims a ~42% attendance rise The white-label rollout — the club's owner confirming 'Lucky Fan Index is already available for other clubs as a ready solution' — signals the mechanism generalised beyond one club, and the campaign is cited in Polish marketing press as the move that turned fan superstition from a disincentive into a revenue channel.

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The sources

  1. WirtualneMedia — Złoto dla VML Poland na Cannes Lions. Za rozwiązanie dla Wisły Kraków Wirtualne Media · wirtualnemedia.pl
  2. NowyMarketing — Wisła Kraków i VML z Grand Prix Cannes Lions. Lucky Fan Index przyniósł Polsce sześć lwów NowyMarketing · nowymarketing.pl